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Class Client (2.6.2) | Python client library

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Client(
    project=None,
    credentials=None,
    _http=None,
    location=None,
    default_query_job_config=None,
    client_info=None,
    client_options=None,
)

Client to bundle configuration needed for API requests.

Project ID for the project which the client acts on behalf of. Will be passed when creating a dataset / job. If not passed, falls back to the default inferred from the environment.

The OAuth2 Credentials to use for this client. If not passed (and if no _http object is passed), falls back to the default inferred from the environment.

HTTP object to make requests. Can be any object that defines request() with the same interface as requests.Session.request. If not passed, an _http object is created that is bound to the credentials for the current object. This parameter should be considered private, and could change in the future.

Default location for jobs / datasets / tables.

Default QueryJobConfig. Will be merged into job configs passed into the query method.

The client info used to send a user-agent string along with API requests. If None, then default info will be used. Generally, you only need to set this if you're developing your own library or partner tool.

Client options used to set user options on the client. API Endpoint should be set through client_options.

Default location for jobs / datasets / tables.

Explicitly state that clients are not pickleable.

cancel_job(job_id, project=None, location=None, retry=<google.api_core.retry.Retry object>, timeout=None)

Unique job identifier.

Close the underlying transport objects, releasing system resources.

copy_table(sources, destination, job_id=None, job_id_prefix=None, location=None, project=None, job_config=None, retry=<google.api_core.retry.Retry object>, timeout=None)

Table or tables to be copied.

Table into which data is to be copied.

create_dataset(dataset, exists_ok=False, retry=<google.api_core.retry.Retry object>, timeout=None)

A Dataset to create. If dataset is a reference, an empty dataset is created with the specified ID and client's default location.

Defaults to False. If True, ignore "already exists" errors when creating the dataset.

How to retry the RPC.

The number of seconds to wait for the underlying HTTP transport before using retry.

create_job(job_config, retry=<google.api_core.retry.Retry object>, timeout=None)

Create a new job.

configuration job representation returned from the API.

create_routine(routine, exists_ok=False, retry=<google.api_core.retry.Retry object>, timeout=None)

A Routine to create. The dataset that the routine belongs to must already exist.

Defaults to False. If True, ignore "already exists" errors when creating the routine.

How to retry the RPC.

The number of seconds to wait for the underlying HTTP transport before using retry.

create_table(table, exists_ok=False, retry=<google.api_core.retry.Retry object>, timeout=None)

A Table to create. If table is a reference, an empty table is created with the specified ID. The dataset that the table belongs to must already exist.

Defaults to False. If True, ignore "already exists" errors when creating the table.

How to retry the RPC.

The number of seconds to wait for the underlying HTTP transport before using retry.

dataset(dataset_id, project=None)

Deprecated: Construct a reference to a dataset.

As of

version 1.7.0, all client methods that take a xref_DatasetReference or xref_TableReference also take a string in standard SQL format, e.g.

or

.

ID of the dataset.

Project ID for the dataset (defaults to the project of the client).

delete_dataset(dataset, delete_contents=False, retry=<google.api_core.retry.Retry object>, timeout=None, not_found_ok=False)

A reference to the dataset to delete. If a string is passed in, this method attempts to create a dataset reference from a string using from_string.

If True, delete all the tables in the dataset. If False and the dataset contains tables, the request will fail. Default is False.

How to retry the RPC.

The number of seconds to wait for the underlying HTTP transport before using retry.

Defaults to False. If True, ignore "not found" errors when deleting the dataset.

delete_model(model, retry=<google.api_core.retry.Retry object>, timeout=None, not_found_ok=False)

A reference to the model to delete. If a string is passed in, this method attempts to create a model reference from a string using from_string.

How to retry the RPC.

The number of seconds to wait for the underlying HTTP transport before using retry.

Defaults to False. If True, ignore "not found" errors when deleting the model.

delete_routine(routine, retry=<google.api_core.retry.Retry object>, timeout=None, not_found_ok=False)

A reference to the routine to delete. If a string is passed in, this method attempts to create a routine reference from a string using from_string.

How to retry the RPC.

The number of seconds to wait for the underlying HTTP transport before using retry.

Defaults to False. If True, ignore "not found" errors when deleting the routine.

delete_table(table, retry=<google.api_core.retry.Retry object>, timeout=None, not_found_ok=False)

A reference to the table to delete. If a string is passed in, this method attempts to create a table reference from a string using from_string.

How to retry the RPC.

The number of seconds to wait for the underlying HTTP transport before using retry.

Defaults to False. If True, ignore "not found" errors when deleting the table.

extract_table(source, destination_uris, job_id=None, job_id_prefix=None, location=None, project=None, job_config=None, retry=<google.api_core.retry.Retry object>, timeout=None, source_type='Table')

Table or Model to be extracted.

URIs of Cloud Storage file(s) into which table data is to be extracted; in format gs://<bucket_name>/<object_name_or_glob>.

from_service_account_info(info, *args, **kwargs)

Factory to retrieve JSON credentials while creating client.

Remaining positional arguments to pass to constructor.

The JSON object with a private key and other credentials information (downloaded from the Google APIs console).

from_service_account_json(json_credentials_path, *args, **kwargs)

Factory to retrieve JSON credentials while creating client.

Remaining positional arguments to pass to constructor.

The path to a private key file (this file was given to you when you created the service account). This file must contain a JSON object with a private key and other credentials information (downloaded from the Google APIs console).

get_dataset(dataset_ref, retry=<google.api_core.retry.Retry object>, timeout=None)

Fetch the dataset referenced by dataset_ref

A reference to the dataset to fetch from the BigQuery API. If a string is passed in, this method attempts to create a dataset reference from a string using from_string.

How to retry the RPC.

The number of seconds to wait for the underlying HTTP transport before using retry.

get_job(job_id, project=None, location=None, retry=<google.api_core.retry.Retry object>, timeout=None)

Unique job identifier.

get_model(model_ref, retry=<google.api_core.retry.Retry object>, timeout=None)

[Beta] Fetch the model referenced by model_ref.

A reference to the model to fetch from the BigQuery API. If a string is passed in, this method attempts to create a model reference from a string using from_string.

How to retry the RPC.

The number of seconds to wait for the underlying HTTP transport before using retry.

get_routine(routine_ref, retry=<google.api_core.retry.Retry object>, timeout=None)

[Beta] Get the routine referenced by routine_ref.

A reference to the routine to fetch from the BigQuery API. If a string is passed in, this method attempts to create a reference from a string using from_string.

How to retry the API call.

The number of seconds to wait for the underlying HTTP transport before using retry.

get_service_account_email(project=None, retry=<google.api_core.retry.Retry object>, timeout=None)

Get the email address of the project's BigQuery service account

Project ID to use for retreiving service account email. Defaults to the client's project.

How to retry the RPC.

The number of seconds to wait for the underlying HTTP transport before using retry.

get_table(table, retry=<google.api_core.retry.Retry object>, timeout=None)

Fetch the table referenced by table.

A reference to the table to fetch from the BigQuery API. If a string is passed in, this method attempts to create a table reference from a string using from_string.

How to retry the RPC.

The number of seconds to wait for the underlying HTTP transport before using retry.

insert_rows(table, rows, selected_fields=None, **kwargs)

Keyword arguments to insert_rows_json.

The destination table for the row data, or a reference to it.

Row data to be inserted. If a list of tuples is given, each tuple should contain data for each schema field on the current table and in the same order as the schema fields. If a list of dictionaries is given, the keys must include all required fields in the schema. Keys which do not correspond to a field in the schema are ignored.

The fields to return. Required if table is a TableReference.

insert_rows_from_dataframe(
    table, dataframe, selected_fields=None, chunk_size=500, **kwargs
)

Insert rows into a table from a dataframe via the streaming API.

Keyword arguments to insert_rows_json.

The destination table for the row data, or a reference to it.

A pandas.DataFrame containing the data to load. Any NaN values present in the dataframe are omitted from the streaming API request(s).

The fields to return. Required if table is a TableReference.

The number of rows to stream in a single chunk. Must be positive.

insert_rows_json(table, json_rows, row_ids=None, skip_invalid_rows=None, ignore_unknown_values=None, template_suffix=None, retry=<google.api_core.retry.Retry object>, timeout=None)

The destination table for the row data, or a reference to it.

Row data to be inserted. Keys must match the table schema fields and values must be JSON-compatible representations.

Unique IDs, one per row being inserted. An ID can also be None, indicating that an explicit insert ID should not be used for that row. If the argument is omitted altogether, unique IDs are created automatically.

Insert all valid rows of a request, even if invalid rows exist. The default value is False, which causes the entire request to fail if any invalid rows exist.

Accept rows that contain values that do not match the schema. The unknown values are ignored. Default is False, which treats unknown values as errors.

Treat name as a template table and provide a suffix. BigQuery will create the table <name> + <template_suffix> based on the schema of the template table. See https://cloud.google.com/bigquery/streaming-data-into-bigquery#template-tables

How to retry the RPC.

The number of seconds to wait for the underlying HTTP transport before using retry.

job_from_resource(resource)

Detect correct job type from resource and instantiate.

one job resource from API response

list_datasets(project=None, include_all=False, filter=None, max_results=None, page_token=None, retry=<google.api_core.retry.Retry object>, timeout=None)

Project ID to use for retreiving datasets. Defaults to the client's project.

True if results include hidden datasets. Defaults to False.

An expression for filtering the results by label. For syntax, see https://cloud.google.com/bigquery/docs/reference/rest/v2/datasets/list#body.QUERY_PARAMETERS.filter

Maximum number of datasets to return.

Token representing a cursor into the datasets. If not passed, the API will return the first page of datasets. The token marks the beginning of the iterator to be returned and the value of the page_token can be accessed at next_page_token of the google.api_core.page_iterator.HTTPIterator.

How to retry the RPC.

The number of seconds to wait for the underlying HTTP transport before using retry.

list_jobs(project=None, parent_job=None, max_results=None, page_token=None, all_users=None, state_filter=None, retry=<google.api_core.retry.Retry object>, timeout=None, min_creation_time=None, max_creation_time=None)

Project ID to use for retreiving datasets. Defaults to the client's project.

If set, retrieve only child jobs of the specified parent.

Maximum number of jobs to return.

Opaque marker for the next "page" of jobs. If not passed, the API will return the first page of jobs. The token marks the beginning of the iterator to be returned and the value of the page_token can be accessed at next_page_token of google.api_core.page_iterator.HTTPIterator.

If true, include jobs owned by all users in the project. Defaults to :data:False.

If set, include only jobs matching the given state. One of: * "done" * "pending" * "running"

How to retry the RPC.

The number of seconds to wait for the underlying HTTP transport before using retry.

Min value for job creation time. If set, only jobs created after or at this timestamp are returned. If the datetime has no time zone assumes UTC time.

Max value for job creation time. If set, only jobs created before or at this timestamp are returned. If the datetime has no time zone assumes UTC time.

list_models(dataset, max_results=None, page_token=None, retry=<google.api_core.retry.Retry object>, timeout=None)

A reference to the dataset whose models to list from the BigQuery API. If a string is passed in, this method attempts to create a dataset reference from a string using from_string.

Maximum number of models to return. If not passed, defaults to a value set by the API.

Token representing a cursor into the models. If not passed, the API will return the first page of models. The token marks the beginning of the iterator to be returned and the value of the page_token can be accessed at next_page_token of the google.api_core.page_iterator.HTTPIterator.

How to retry the RPC.

The number of seconds to wait for the underlying HTTP transport before using retry.

list_partitions(table, retry=<google.api_core.retry.Retry object>, timeout=None)

List the partitions in a table.

The table or reference from which to get partition info

How to retry the RPC.

The number of seconds to wait for the underlying HTTP transport before using retry. If multiple requests are made under the hood, timeout applies to each individual request.

list_projects(max_results=None, page_token=None, retry=<google.api_core.retry.Retry object>, timeout=None)

Maximum number of projects to return, If not passed, defaults to a value set by the API.

Token representing a cursor into the projects. If not passed, the API will return the first page of projects. The token marks the beginning of the iterator to be returned and the value of the page_token can be accessed at next_page_token of the google.api_core.page_iterator.HTTPIterator.

How to retry the RPC.

The number of seconds to wait for the underlying HTTP transport before using retry.

list_routines(dataset, max_results=None, page_token=None, retry=<google.api_core.retry.Retry object>, timeout=None)

A reference to the dataset whose routines to list from the BigQuery API. If a string is passed in, this method attempts to create a dataset reference from a string using from_string.

Maximum number of routines to return. If not passed, defaults to a value set by the API.

Token representing a cursor into the routines. If not passed, the API will return the first page of routines. The token marks the beginning of the iterator to be returned and the value of the page_token can be accessed at next_page_token of the google.api_core.page_iterator.HTTPIterator.

How to retry the RPC.

The number of seconds to wait for the underlying HTTP transport before using retry.

list_rows(table, selected_fields=None, max_results=None, page_token=None, start_index=None, page_size=None, retry=<google.api_core.retry.Retry object>, timeout=None)

List the rows of the table.

See https://cloud.google.com/bigquery/docs/reference/rest/v2/tabledata/list

The table to list, or a reference to it. When the table object does not contain a schema and selected_fields is not supplied, this method calls get_table to fetch the table schema.

The fields to return. If not supplied, data for all columns are downloaded.

Maximum number of rows to return.

Token representing a cursor into the table's rows. If not passed, the API will return the first page of the rows. The token marks the beginning of the iterator to be returned and the value of the page_token can be accessed at next_page_token of the RowIterator.

The zero-based index of the starting row to read.

The maximum number of rows in each page of results from this request. Non-positive values are ignored. Defaults to a sensible value set by the API.

How to retry the RPC.

The number of seconds to wait for the underlying HTTP transport before using retry. If multiple requests are made under the hood, timeout applies to each individual request.

list_tables(dataset, max_results=None, page_token=None, retry=<google.api_core.retry.Retry object>, timeout=None)

A reference to the dataset whose tables to list from the BigQuery API. If a string is passed in, this method attempts to create a dataset reference from a string using from_string.

Maximum number of tables to return. If not passed, defaults to a value set by the API.

Token representing a cursor into the tables. If not passed, the API will return the first page of tables. The token marks the beginning of the iterator to be returned and the value of the page_token can be accessed at next_page_token of the google.api_core.page_iterator.HTTPIterator.

How to retry the RPC.

The number of seconds to wait for the underlying HTTP transport before using retry.

load_table_from_dataframe(
    dataframe,
    destination,
    num_retries=6,
    job_id=None,
    job_id_prefix=None,
    location=None,
    project=None,
    job_config=None,
    parquet_compression="snappy",
    timeout=None,
)

Upload the contents of a table from a pandas DataFrame.

Similar to load_table_from_uri, this method creates, starts and returns a xref_LoadJob.

A pandas.DataFrame containing the data to load.

The destination table to use for loading the data. If it is an existing table, the schema of the pandas.DataFrame must match the schema of the destination table. If the table does not yet exist, the schema is inferred from the pandas.DataFrame. If a string is passed in, this method attempts to create a table reference from a string using from_string.

load_table_from_file(
    file_obj,
    destination,
    rewind=False,
    size=None,
    num_retries=6,
    job_id=None,
    job_id_prefix=None,
    location=None,
    project=None,
    job_config=None,
    timeout=None,
)

Upload the contents of this table from a file-like object.

Similar to load_table_from_uri, this method creates, starts and returns a xref_LoadJob.

A file handle opened in binary mode for reading.

Table into which data is to be loaded. If a string is passed in, this method attempts to create a table reference from a string using from_string.

load_table_from_json(
    json_rows,
    destination,
    num_retries=6,
    job_id=None,
    job_id_prefix=None,
    location=None,
    project=None,
    job_config=None,
    timeout=None,
)

Upload the contents of a table from a JSON string or dict.

Row data to be inserted. Keys must match the table schema fields and values must be JSON-compatible representations. .. note:: If your data is already a newline-delimited JSON string, it is best to wrap it into a file-like object and pass it to load_table_from_file:: import io from google.cloud import bigquery data = u'{"foo": "bar"}' data_as_file = io.StringIO(data) client = bigquery.Client() client.load_table_from_file(data_as_file, ...)

Table into which data is to be loaded. If a string is passed in, this method attempts to create a table reference from a string using from_string.

load_table_from_uri(source_uris, destination, job_id=None, job_id_prefix=None, location=None, project=None, job_config=None, retry=<google.api_core.retry.Retry object>, timeout=None)

URIs of data files to be loaded; in format gs://<bucket_name>/<object_name_or_glob>.

Table into which data is to be loaded. If a string is passed in, this method attempts to create a table reference from a string using from_string.

query(query, job_config=None, job_id=None, job_id_prefix=None, location=None, project=None, retry=<google.api_core.retry.Retry object>, timeout=None)

SQL query to be executed. Defaults to the standard SQL dialect. Use the job_config parameter to change dialects.

schema_from_json(file_or_path)

Takes a file object or file path that contains json that describes a table schema.

schema_to_json(schema_list, destination)

Takes a list of schema field objects.

Serializes the list of schema field objects as json to a file.

Destination is a file path or a file object.

update_dataset(dataset, fields, retry=<google.api_core.retry.Retry object>, timeout=None)

Change some fields of a dataset.

Use fields to specify which fields to update. At least one field must be provided. If a field is listed in fields and is None in dataset, it will be deleted.

If dataset.etag is not None, the update will only succeed if the dataset on the server has the same ETag. Thus reading a dataset with get_dataset, changing its fields, and then passing it to update_dataset will ensure that the changes will only be saved if no modifications to the dataset occurred since the read.

The dataset to update.

The properties of dataset to change. These are strings corresponding to the properties of Dataset. For example, to update the default expiration times, specify both properties in the fields argument: .. code-block:: python bigquery_client.update_dataset( dataset, [ "default_partition_expiration_ms", "default_table_expiration_ms", ] )

How to retry the RPC.

The number of seconds to wait for the underlying HTTP transport before using retry.

update_model(model, fields, retry=<google.api_core.retry.Retry object>, timeout=None)

[Beta] Change some fields of a model.

Use fields to specify which fields to update. At least one field must be provided. If a field is listed in fields and is None in model, the field value will be deleted.

If model.etag is not None, the update will only succeed if the model on the server has the same ETag. Thus reading a model with get_model, changing its fields, and then passing it to update_model will ensure that the changes will only be saved if no modifications to the model occurred since the read.

The model to update.

The properties of model to change. These are strings corresponding to the properties of Model. For example, to update the descriptive properties of the model, specify them in the fields argument: .. code-block:: python bigquery_client.update_model( model, ["description", "friendly_name"] )

A description of how to retry the API call.

The number of seconds to wait for the underlying HTTP transport before using retry.

update_routine(routine, fields, retry=<google.api_core.retry.Retry object>, timeout=None)

[Beta] Change some fields of a routine.

Use fields to specify which fields to update. At least one field must be provided. If a field is listed in fields and is None in routine, the field value will be deleted.

If xref_etag is not

, the update will only succeed if the resource on the server has the same ETag. Thus reading a routine with xref_get_routine, changing its fields, and then passing it to this method will ensure that the changes will only be saved if no modifications to the resource occurred since the read.

The routine to update.

The fields of routine to change, spelled as the Routine properties. For example, to update the description property of the routine, specify it in the fields argument: .. code-block:: python bigquery_client.update_routine( routine, ["description"] )

A description of how to retry the API call.

The number of seconds to wait for the underlying HTTP transport before using retry.

update_table(table, fields, retry=<google.api_core.retry.Retry object>, timeout=None)

Change some fields of a table.

Use fields to specify which fields to update. At least one field must be provided. If a field is listed in fields and is None in table, the field value will be deleted.

If table.etag is not None, the update will only succeed if the table on the server has the same ETag. Thus reading a table with get_table, changing its fields, and then passing it to update_table will ensure that the changes will only be saved if no modifications to the table occurred since the read.

The table to update.

The fields of table to change, spelled as the Table properties. For example, to update the descriptive properties of the table, specify them in the fields argument: .. code-block:: python bigquery_client.update_table( table, ["description", "friendly_name"] )

A description of how to retry the API call.

The number of seconds to wait for the underlying HTTP transport before using retry.

__init__(
    project=None,
    credentials=None,
    _http=None,
    location=None,
    default_query_job_config=None,
    client_info=None,
    client_options=None,
)

Initialize self. See help(type(self)) for accurate signature.

get_iam_policy(table, requested_policy_version=1, retry=<google.api_core.retry.Retry object>, timeout=None)

API documentation for bigquery.client.Client.get_iam_policy method.

set_iam_policy(table, policy, updateMask=None, retry=<google.api_core.retry.Retry object>, timeout=None)

API documentation for bigquery.client.Client.set_iam_policy method.

test_iam_permissions(table, permissions, retry=<google.api_core.retry.Retry object>, timeout=None)

API documentation for bigquery.client.Client.test_iam_permissions method.

Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License, and code samples are licensed under the Apache 2.0 License. For details, see the Google Developers Site Policies. Java is a registered trademark of Oracle and/or its affiliates.

Last updated 2025-08-07 UTC.

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